Btw. they modularised everything, so packages can be released independently (there are interdependencies of course). Unfortunately it is a bit painful to download and build each package, though distribution packagers should handle it. Xorg release is a snapshot of certain versions of (most) packages.

I have a SPARC server running Slackware 12.0 but cannot use Xorg 7.2 because the Xserver can't initialise either the Tech Source GFX (Permedia 2) graphics adapter with the "glint" driver or a PC Radeon 9250 with the "ati" driver.

Looks like a question for Xorg esperts (->xorg mailing list). I guess the answer depends if card(s) is programmable enough to turn off VGA stuff and able to handle remapped IO regions, but also I'm not sure if libpciaccess and kernel stuff is already capable of supporting two video devices at the same time.